Clutch



(No Modell) Y v v 2 Sheets-Sheet 1 B. MGGOVERN.

CLUTCH.

No'. 512,736. Patented Jam 16, l1894.

- ment.

NrTED STATESr PATENT OFFICE.;

BERNARD 'Moe'ovERN, on BOSTON, MASSACHUSETTS.

cLUrcn-l.`

SPECIFICATION forming part of Letters Patent No. 512,736, dated January 16, 1894.

.Application tiled July 24,1893. Serial No. 481,252- (No model.)

To a/ZZ whom it may concer/'71,:

13e it known that I, BERNARD MCGOVERN, a citrzen of the United States, residingin Boston, 1u the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Clutches, of which the following is a specification.

This invention has for its principal objectto avoid rattling by preventing looseness or lost motion when the two parts of the clutch come together, and it consists in the novel .construction and arrangement of parts heremafter described and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of a clutch embodying my invention with the two parts in engagement. Fig. 2 is a horizontal section taken on llne sc, Fig. 6, the parts being in engage- Fig. 3 is a planview with the parts out of engagement or unclutched. Fig. 4 is a section taken on line Y, Fig. 3, looking toward the left and showing the recessed hub or pulley B. Fig. 5 is a section taken on line Y, Fig. 3, looking toward the right. YFig. 6 is a cross ksection taken through the locking. ring when in the position shown in Fig. 3.

Similar letters of reference indicate corresponding parts.

A represents the shaft. B is the loose pulley or sleeve, loose on said shaft and provided with recesses B. This pulley may be connected by a gear b, or. any other suitable means,with the Work, such as hoisting mechanism for instance.

C is the other part of the clutch sliding on the shaft A but prevented from relative ro-A being the ordinary clutch of this class or style.

It is found in practice that when one part of the clutch is moved into engagement with the other there is more orfless rattling by reason of the relative rotative movements of the two parts of the cliitch, and of the 'pro-` jections C in the recesses B. To obviate this diiiiculty I provide the ring or annular Thus far cap-E. This .ring is adapted to slide freely on the part C by means of the shipping lever F a projection f from which enters the annular groove lE on the periphery of said ring. While the ring or cap is free to slide laterally, it has no rotative movement with relation to the part C inasmuch as it is provided with integral projections l which extend from the inner side of the ring into'corresponding longitudinal grooves C inthe part C. These grooves serve as guides for the sliding of the ring. Moreover this ring is provided with integral, inwardly extending projections or keys H which extend into corresponding radial supplemental recesses K inthe part C,

such recesses extending inward from the inner Walls ot the recesses 0 formed by the spaces between the projections C. These recesses K are located next a proj ection' C and the remainder of the space in each recess 0', t'. e. the portion of said recess' Cf between the edge of the recessK and the farther projection C', is equal to the excess of the Width of a recess B in the part B over the Width of a projection C from the part C.4 The normal position of the ring E is toward the right, as shown in Figs. 3 and 6, that is to say with its projections H within the .recess K. Now if the part G be moved by the shipping lever D4 into engagement with the part Bfthe excess ot the width of the recess B over that of the projections C', will cause rattling; but if at the same time that the parts are moved into engagement, the shipping lever F moves the ring E, (guided by the projections I and grooves Cf) toward the left into the lposition shown in Figs. 1 and 2, its projections or keys H will leave the recesses K and move into and fill the excess of space in the recesses B', so

that there is no rattiin g or lost motion. When the device is unclutched. thering E maybe moved back into the position shown in Fig. 3.

'than' the said recesses, and the said part C Y being further provided with the supplemental recesses K extending inward from the re? the excess .of` space in the recesses B when cesses 0 formedby said projections C", the the' device is nnciutched, substantially as set lockmg ring or annular cap E adapted to be forth.

moved laterally but not rotatively on the part BERNARD MCGOVERN. 5 C and provided with the inward projections Witnesses:

or keys H of size and shape to fit1 into the re- HENRY W. WILLIAMS,

cesses K when the device is clutched and into A. G. BELOHER. 

